Nice prototype!
It is an excelent skeleton project for something bigger... I know the tiny was the theme of the Jam, but I think you need to think about to extend the world, add new features to your gun, but first... Sount music and some story.
The base mechenics is srtong enough and this lowpoly world is quite good lokkling!
Good job!
Come scan my game and repair it with some ratings.
Have FUN :3